Dr Michael Peter Koumjian, MD - Medicare Cardiac Surgery in La Mesa, CA

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Dr Michael Peter Koumjian, MD is a medicare enrolled "Thoracic Surgery (cardiothoracic Vascular Surgery)" physician in La Mesa, California. He went to Rutgers New Jersey Medical School and graduated in 1977 and has 48 years of diverse experience with area of expertise as Cardiac Surgery. He is a member of the group practice On Call Specialists Medical Group Of San Diego Inc and his current practice location is 5525 Grossmont Center Dr, Ste 609, La Mesa, California. You can reach out to his office (for appointments etc.) via phone at (619) 466-5700.

Dr Michael Peter Koumjian is licensed to practice in California (license number G37886) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1366403321.

Contact Information

Dr Michael Peter Koumjian, MD
5525 Grossmont Center Dr, Ste 609,
La Mesa, CA 91942
(619) 466-5700
(619) 460-8975

Map and Direction




Physician's Profile

Full NameDr Michael Peter Koumjian
GenderMale
SpecialityCardiac Surgery
Experience48 Years
Location5525 Grossmont Center Dr, La Mesa, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Dr Michael Peter Koumjian attended and graduated from Rutgers New Jersey Medical School in 1977
  NPI Data:
  • NPI Number: 1366403321
  • Provider Enumeration Date: 03/30/2006
  • Last Update Date: 02/02/2018
  Medicare PECOS Information:
  • PECOS PAC ID: 1153337035
  • Enrollment ID: I20060301000763

Medical Identifiers

Medical identifiers for Dr Michael Peter Koumjian such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1366403321NPI-NPPES
GR0066270MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
208G00000XThoracic Surgery (cardiothoracic Vascular Surgery) G37886 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Loma Linda University Medical Center-murrietaMurrieta, CAHospital
Grossmont HospitalLa mesa, CAHospital

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr Michael Peter Koumjian allows following entities to bill medicare on his behalf.
Entity NameScripps Health
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1275899072
PECOS PAC ID: 9234033853
Enrollment ID: O20031124000822
Entity NameEmergency And Acute Care Medical Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1437103942
PECOS PAC ID: 9537108279
Enrollment ID: O20050502000734
Entity NameMichael P Koumjian Md A Professional Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1528276078
PECOS PAC ID: 0244266187
Enrollment ID: O20050712001211
Entity NameOn Call Specialists Medical Group Of San Diego Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1962175836
PECOS PAC ID: 7911395231
Enrollment ID: O20211019001466

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr Michael Peter Koumjian is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Dr Michael Peter Koumjian, MD
5525 Grossmont Center Dr Ste 609,
La Mesa, CA 91942-3009

Ph: (619) 466-5700		Dr Michael Peter Koumjian, MD
5525 Grossmont Center Dr, Ste 609,
La Mesa, CA 91942

Ph: (619) 466-5700

Reviews and Comments


Thoracic Surgery (Cardiothoracic Vascular Surgery) Doctors in La Mesa, CA

Hugo Edgardo Gomez-engler, M.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery)
Medicare: Not Enrolled in Medicare
Practice Location: 5525 Grossmont Center Dr, Suite 609, La Mesa, CA 91942
Phone: 619-466-5700    Fax: 619-460-8975

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.